Thermal insulation platform and vibration experiment device

Abstract

The present application relates to a kind of heat insulation platform, it includes heat insulation plate, first connecting piece and second connecting piece.Heat insulation plate is used to be arranged between vibration table group and heating plate, first connecting piece is used to connect heat insulation plate and vibration table group, and the length of first connecting piece is less than the thickness of heat insulation plate when being contained in heat insulation plate;Second connecting piece is spaced apart from first connecting piece, and second connecting piece is used to connect heat insulation plate and heating plate, and the length of second connecting piece is less than the thickness of heat insulation plate when being contained in heat insulation plate.When long time high temperature condition vibration fatigue test experiment is carried out to experimental sample, since first connecting piece does not directly contact heating plate, second connecting piece does not directly contact vibration table group, the heat generated by heating plate is not easily directly transmitted to vibration table group through first connecting piece or second connecting piece.Therefore, the temperature of vibration table group is low, and damage is not easily occurred;And the vibration signal transmitted to experimental sample through heat insulation plate is more accurate, and the experimental data obtained ultimately is also more accurate.

Description

Technical Field

[0001] This invention relates to the field of vibration testing technology, and in particular to a heat-insulated platform and vibration testing apparatus. Background Technology

[0002] Modular semiconductor products possess excellent performance and are therefore widely used in various industries. For example, IGBT (Insulated Gate Bipolar Transistor) modules have been widely applied in strategic emerging industries such as new energy vehicles, rail transit, and smart grids.

[0003] When studying the performance of modular semiconductor products, vibration fatigue tests are conducted under different operating conditions, including varying acceleration, frequency, amplitude, and temperature, to obtain service life reports under different conditions. In existing vibration testing setups, to avoid excessive platform weight that hinders the increase of vibration acceleration, the extended platform supporting the heating plate and test sample is typically made as small and lightweight as possible. Therefore, when studying the vibration fatigue performance of test samples under prolonged high-temperature conditions, this vibration testing setup easily transfers the heat from the heating plate to the vibration table assembly, making the assembly prone to damage. To address this, some vibration testing setups use asbestos pads between the heating plate and the vibration table assembly. However, due to the soft nature of asbestos pads, the vibration signals transmitted to the test sample are inaccurate, resulting in larger errors in the experimental results and lower accuracy in the performance studies of the test samples. Summary of the Invention

[0004] Therefore, it is necessary to provide a heat-insulating platform to address the technical problem that asbestos pads cause significant errors in experimental results when conducting long-term high-temperature vibration fatigue tests on experimental samples using existing vibration experimental devices, thereby reducing the accuracy of the results of performance studies on the experimental samples.

[0005] A heat-insulating platform includes a heat-insulating plate, a first connector, and a second connector. The heat-insulating plate is disposed between a vibration table assembly and a heating plate. The first connector connects the heat-insulating plate and the vibration table assembly, and the length of the first connector housed within the heat-insulating plate is less than the thickness of the heat-insulating plate. The second connector is spaced apart from the first connector and connects the heat-insulating plate and the heating plate, and the length of the second connector housed within the heat-insulating plate is less than the thickness of the heat-insulating plate.

[0006] In one embodiment, the heat insulation plate is provided with a first connection hole, and the end of the first connector away from the vibration table assembly is accommodated in the first connection hole and connected to the hole wall of the first connection hole.

[0007] In one embodiment, the first connecting hole is a through hole penetrating the heat insulation plate; or the first connecting hole is a blind hole with its opening facing the vibration table assembly.

[0008] In one embodiment, the number of the first connecting holes is multiple, and the multiple first connecting holes are spaced apart along the length of the heat insulation plate, and / or the multiple first connecting holes are spaced apart along the width of the heat insulation plate.

[0009] In one embodiment, a second connecting hole is provided on the side of the heat insulation plate away from the vibration table assembly. The second connecting hole is spaced apart from the first connecting hole. The end of the second connector away from the heating plate is accommodated in the second connecting hole and connected to the hole wall of the second connecting hole.

[0010] In one embodiment, the second connection hole is a blind hole with an opening facing the heating plate.

[0011] In one embodiment, the number of the second connecting holes is multiple, and the multiple second connecting holes are spaced apart along the length of the heat insulation plate, and / or the multiple second connecting holes are spaced apart along the width of the heat insulation plate.

[0012] The present invention also provides a vibration testing apparatus that can solve at least one of the above-mentioned technical problems.

[0013] The vibration experimental apparatus provided by the present invention includes the aforementioned heat-insulating platform, a vibration table assembly, and a heating plate. The vibration table assembly includes an extension stage, which has a third connecting hole. One end of the first connector, away from the heat-insulating plate, is accommodated in the third connecting hole and connected to the hole wall of the third connecting hole. The heating plate is used to connect to the experimental sample. A fourth connecting hole is provided on the side of the heating plate away from the experimental sample. One end of the second connector, away from the heat-insulating plate, is accommodated in the fourth connecting hole and connected to the hole wall of the fourth connecting hole.

[0014] In one embodiment, a temperature control box is also included, which is electrically connected to the heating plate.

[0015] In one embodiment, an air outlet assembly is also included, which is connected to the vibration table assembly.

[0016] The beneficial effects of this invention are:

[0017] This invention provides a heat-insulated platform. When conducting long-term high-temperature vibration fatigue tests on experimental samples, the sample is first connected to the side of the heating plate away from the heat insulation plate. The heating plate is then heated to a preset temperature. The vibration table assembly vibrates and transmits the vibration signal to the experimental sample through the heat insulation plate and the heating plate. Because the length of the first connector housed in the heat insulation plate is less than the thickness of the heat insulation plate, the first connector does not directly contact the heating plate, and the heat generated by the heating plate itself is not easily transferred to the vibration table assembly through the first connector. Similarly, the length of the second connector housed in the heat insulation plate is less than the thickness of the heat insulation plate, so the second connector does not directly contact the vibration table assembly, and the heat generated by the heating plate is not easily transferred directly to the vibration table assembly through the second connector. Since the first and second connectors are spaced apart, they do not directly contact each other, further preventing the heat transferred from the heating plate to the second connector from being directly transferred to the first connector and the vibration table assembly. Ultimately, this results in a lower temperature for the vibration table assembly, reducing the risk of damage. Meanwhile, since the heat insulation board itself does not absorb a large amount of vibration energy, the vibration signal transmitted by the heat insulation board to the experimental sample is more accurate, the error of the obtained experimental data is smaller, and the accuracy of the experimental results is higher.

[0018] The present invention provides a vibration testing apparatus in which the aforementioned heat-insulating platform is installed between the vibration table assembly and the heating plate. When it is necessary to conduct long-term vibration fatigue testing on experimental samples under high-temperature conditions, at least one of the aforementioned technical effects can be achieved. Attached Figure Description

[0019] Figure 1 A schematic diagram of the vibration experimental apparatus provided in the first embodiment of the present invention;

[0020] Figure 2 for Figure 1 A cross-sectional view of the vibration test apparatus shown, in which the heat insulation plate, heating plate, and test sample are mounted on the expansion stage and the moving coil.

[0021] Figure 3 for Figure 1 A cross-sectional view of the heat insulation plate in the vibration experimental setup shown.

[0022] Figure 4 A schematic diagram of the vibration experimental apparatus provided in the second embodiment of the present invention;

[0023] Figure 5 for Figure 4 A cross-sectional view of the vibration test apparatus shown, in which the heat insulation plate, heating plate, and test sample are mounted on the expansion stage and the moving coil.

[0024] Figure 6 for Figure 3 A cross-sectional view of the heat insulation plate in the vibration test apparatus shown.

[0025] Reference numerals: 100-Insulation plate; 110-First connecting hole; 120-Second connecting hole; 210-First connector; 220-Second connector; 230-Third connector; 240-Fourth connector; 300-Vibration table assembly; 310-Extension stage; 311-Third connecting hole; 312-Fifth connecting hole; 320-Moving coil; 321-Sixth connecting hole; 330-Outer shell; 400-Heating plate; 410-Fourth connecting hole; 420-Seventh connecting hole; 500-Temperature control box; 510-Display screen; 520-Indicator light; 530-Temperature sensor; 600-Experimental sample; 610-Eighth connecting hole; 700-Air outlet assembly. Detailed Implementation

[0026] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0031] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0032] See Figures 1-6 , Figure 1 A schematic diagram of the vibration experimental apparatus provided in the first embodiment of the present invention is shown; Figure 2 It shows Figure 1 A cross-sectional view of the vibration test apparatus shown, in which the heat insulation plate, heating plate, and test sample are mounted on the expansion stage and the moving coil. Figure 3 It shows Figure 1 A cross-sectional view of the heat insulation plate in the vibration experimental setup shown. Figure 4 A schematic diagram of the vibration experimental apparatus provided in the second embodiment of the present invention is shown; Figure 5 It shows Figure 4 A cross-sectional view of the vibration test apparatus shown, in which the heat insulation plate, heating plate, and test sample are mounted on the expansion stage and the moving coil. Figure 6 It shows Figure 3The diagram shows a cross-sectional view of the heat insulation plate in the vibration experimental apparatus. An embodiment of the present invention provides a heat insulation platform, comprising a heat insulation plate 100, a first connecting member 210, and a second connecting member 220. The heat insulation plate 100 is disposed between the vibration table assembly 300 and the heating plate 400; the first connecting member 210 connects the heat insulation plate 100 and the vibration table assembly 300, and the length of the first connecting member 210 accommodated within the heat insulation plate 100 is less than the thickness of the heat insulation plate 100; the second connecting member 220 is spaced apart from the first connecting member 210, and the second connecting member 220 connects the heat insulation plate 100 and the heating plate 400, and the length of the second connecting member 220 accommodated within the heat insulation plate 100 is less than the thickness of the heat insulation plate 100.

[0033] When conducting a long-term high-temperature vibration fatigue test on the test sample 600 using the vibration test apparatus composed of the heat insulation platform provided by this invention, the test sample 600 is first connected to the side of the heating plate 400 away from the heat insulation plate 100 via the fourth connector 240. Then, the heating plate 400 is heated to a preset temperature, and the vibration table assembly 300 vibrates, transmitting the vibration signal to the test sample 600 through the heat insulation plate 100 and the heating plate 400. Since the length of the first connector 210 housed within the heat insulation plate 100 is less than the thickness of the heat insulation plate 100, the first connector 210 does not directly contact the heating plate 400, and the heat generated by the heating plate 400 itself is not easily transferred to the vibration table assembly 300 through the first connector 210. Similarly, the length of the second connector 220 housed within the heat insulation plate 100 is less than the thickness of the heat insulation plate 100, so the second connector 220 does not directly contact the vibration table assembly 300, and the heat generated by the heating plate 400 is not easily transferred directly to the vibration table assembly 300 through the second connector 220. Because the first connector 210 and the second connector 220 are spaced apart, they do not come into direct contact. This further prevents the heat transferred from the heating plate 400 to the second connector 220 from being directly transferred to the first connector 210 and the vibration table assembly 300, resulting in a lower temperature for the vibration table assembly 300 and reducing its susceptibility to damage. Simultaneously, since the heat insulation plate 100 does not absorb a large amount of vibration energy, the vibration signal transmitted from the heat insulation plate 100 to the experimental sample 600 is more accurate, leading to smaller errors in the obtained experimental data and higher accuracy of the experimental results.

[0034] It should be noted that, because the heat insulation plate 100 is connected to the vibration table assembly 300 and the heating plate 400 via the first connector 210 and the second connector 220, the reliability of the connection between the heat insulation plate 100 and the vibration table assembly 300 and the heating plate 400 is effectively improved. During long-term vibration experiments, the connection between the heat insulation plate 100 and the vibration table assembly 300 and the heating plate 400 is relatively stable, and the experimental sample 600 is unlikely to detach from the heating plate 400 relative to the vibration table assembly 300, making the entire experimental process safer. At the same time, when the heating plate 400 or the vibration table assembly 300 is damaged, replacement can be performed very conveniently, avoiding the situation where, when the heat insulation plate 100 is glued to the vibration table assembly 300 and the heating plate 400, the only way to replace the heating plate 400 or the vibration table assembly 300 is by damaging the heat insulation plate 100. In one specific implementation, both the first connector 210 and the second connector 220 are threaded connectors, such as studs or bolts. Of course, in other embodiments, the first connector 210 and the second connector 220 may also be pins or the like, and there is no limitation on this, as long as they can achieve the function of firmly connecting the heat insulation plate 100 with the vibration table assembly 300 and the heating plate 400.

[0035] In one specific embodiment, the heat insulation panel 100 is made of mica board. The heat insulation panel 100 made of mica board not only has good heat insulation effect but is also safer, effectively reducing the risk of asbestos releasing carcinogenic substances under prolonged high temperatures, which is common when heat insulation panels 100 are made of materials such as asbestos pads. Of course, in other embodiments, the heat insulation panel 100 can also be made of quartz; this is not a limitation.

[0036] In one embodiment, experimental sample 600 is a modular semiconductor product, such as an IGBT module. Because IGBT modules are modular semiconductor products assembled from IGBTs and FWD (Freewheeling diode) chips via a specific circuit bridge, they possess excellent performance and are therefore widely used. Especially in the field of new energy vehicles, IGBT modules are core technical components of electric vehicles and charging piles, accounting for nearly 10% of the cost of electric vehicles and approximately 20% of the cost of charging piles. Therefore, research on the performance of IGBT modules themselves is particularly important.

[0037] In one specific embodiment, the experimental sample 600 is a welded IGBT module. The vibration testing device, composed of the heat-insulating platform provided by this invention, can conduct long-term high-temperature vibration fatigue tests on the weld strength of the IGBT module's weld joints. This achieves the purpose of studying the vibration fatigue of the welded IGBT module, clarifying the influence of different welding parameters on weld strength, and ultimately providing relevant reference suggestions for improving the intelligent operation and maintenance technology of electric vehicles. Specifically, the welded IGBT module uses model FF150R12ME3G, which internally contains three parallel half-bridge modules, three upper IGBT chips, three lower IGBT chips, and six anti-parallel diode chips. Of course, in other embodiments, the experimental sample 600 can also be other modular semiconductor products; this is not limited. As long as the experimental sample 600 needs to obtain vibration fatigue test results under different experimental conditions, the vibration testing device containing the heat-insulating platform provided by this invention can be used.

[0038] When studying the performance of IGBT modules, vibration fatigue tests are conducted on them under different parameters such as acceleration, frequency, amplitude, and temperature, simulating different operating conditions of new energy vehicles, to obtain service life reports under different conditions. When conducting long-term high-temperature vibration fatigue tests on IGBT modules using the vibration experimental device composed of the heat-insulating platform provided in this invention, the IGBT module is first connected to the side of the heating plate 400 away from the heat-insulating plate 100 via the fourth connector 240. The heat-insulating plate 100 is then connected to the vibration table assembly 300 and the heating plate 400 via the first connector 210 and the second connector 220. The heating plate 400 is then heated to a preset temperature, and the vibration table assembly 300 is turned on, causing it to vibrate and transmit the vibration signal to the IGBT module through the heat-insulating plate 100 and the heating plate 400. Because the length of the first connector 210 housed within the heat insulation plate 100 is less than the thickness of the heat insulation plate 100, the first connector 210 will not directly contact the heating plate 400, and the heat generated by the heating plate 400 itself is not easily transferred to the vibration table assembly 300 through the first connector 210. Similarly, the length of the second connector 220 housed within the heat insulation plate 100 is less than the thickness of the heat insulation plate 100, so the second connector 220 will not directly contact the vibration table assembly 300, and the heat generated by the heating plate 400 will not easily be directly transferred to the vibration table assembly 300 through the second connector 220. Since the first connector 210 and the second connector 220 are spaced apart, and they will not directly contact each other, the heat transferred from the heating plate 400 to the second connector 220 is further prevented from being directly transferred to the first connector 210 and the vibration table assembly 300, ultimately resulting in a lower temperature for the vibration table assembly 300 and reducing its susceptibility to damage. Meanwhile, since the heat insulation plate 100 itself does not absorb a large amount of vibration energy, the vibration signal transmitted by the heat insulation plate 100 to the IGBT module is more accurate. As a result, the error of the experimental data obtained by the IGBT module under different working conditions is smaller, and the accuracy of the experimental results is also higher.

[0039] Please see Figures 1-6 The heat insulation plate 100 of the heat insulation platform of the vibration experimental device provided in this embodiment of the invention is provided with a first connecting hole 110. The end of the first connecting member 210 away from the vibration table assembly 300 is accommodated in the first connecting hole 110 and connected to the hole wall of the first connecting hole 110. When the vibration table assembly 300 malfunctions and needs to be repaired or maintained, it is only necessary to separate the first connecting member 210 from the hole wall of the first connecting hole 110 to complete the separation of the heat insulation plate 100 from the vibration table assembly 300, which is very simple and convenient.

[0040] Please see Figures 4-6In the second embodiment of the vibration experimental apparatus provided by the present invention, the first connecting hole 110 of the heat insulation platform is a through hole penetrating the heat insulation plate 100. Since the first connecting hole 110 is a through hole, when the heat insulation plate 100 needs to be installed on the vibration table assembly 300, the first connecting member 210 can easily pass through the first connecting hole 110 and connect to the wall of the third connecting hole 311 provided on the vibration table assembly 300. In one specific embodiment, the first connecting hole 110 is a stepped threaded hole, and the first connecting member 210 is a bolt, which facilitates installation and effectively reduces heat transfer.

[0041] Please see Figures 1-3 In the first embodiment of the vibration experimental apparatus provided by the present invention, the first connecting hole 110 of the heat insulation platform is a blind hole with its opening facing the vibration table assembly 300. By setting the first connecting hole 110 as a blind hole with its opening facing the vibration table assembly 300, it is difficult for the heat from the heating plate 400 located above the heat insulation plate 100 to be transferred to the first connecting member 210, which can effectively reduce the heat transferred to the vibration table assembly 300 through the first connecting member 210. The temperature of the vibration table assembly 300 is lower and it is less likely to be damaged.

[0042] Please see Figures 1-6 The vibration experimental apparatus provided in the first and second embodiments of the present invention has multiple first connection holes 110 on the heat insulation platform, which are spaced apart along the length of the heat insulation plate 100. Because of the multiple first connection holes 110, the connection between the heat insulation plate 100 and the vibration table assembly 300 is more stable, and they are less likely to detach under prolonged vibration, resulting in higher stability of the entire vibration experimental apparatus. In one specific embodiment, when performing a vibration experiment on the experimental sample 600 involving displacement along the width direction of the heat insulation plate 100, the multiple first connection holes 110 spaced apart along the length of the heat insulation plate 100 mean that the displacement of the heat insulation plate 100 relative to the vibration table assembly 300 due to its own vibration during the experiment has a smaller impact on the vibration experiment results, thus reducing the error in the obtained experimental data and increasing the accuracy of the experimental results.

[0043] In some embodiments, a plurality of first connecting holes 110 are spaced apart along the width of the heat insulation plate 100. Due to the presence of multiple first connecting holes 110, the connection between the heat insulation plate 100 and the vibration table assembly 300 is more stable, and they are less likely to detach under prolonged vibration, resulting in higher stability of the entire vibration experimental setup. In one specific embodiment, when performing a vibration experiment on the experimental sample 600 involving displacement along the length of the heat insulation plate 100, the multiple first connecting holes 110 are spaced apart along the width of the heat insulation plate 100. Therefore, during the experiment, the displacement of the heat insulation plate 100 relative to the vibration table assembly 300 due to its own vibration has a smaller impact on the vibration experiment results, leading to smaller errors in the obtained experimental data and higher accuracy of the experimental results.

[0044] In other embodiments, a plurality of first connection holes 110 are spaced apart along the length and width directions of the heat insulation plate 100. When the experimental sample 600 is subjected to relatively intense vibration tests with displacement in the length and width directions, the connection stability between the heat insulation plate 100 and the vibration table assembly 300 is high.

[0045] Please see Figures 1-6 In the first and second embodiments of the vibration experimental apparatus of the present invention, the heat insulation plate 100 of the heat insulation platform has a second connecting hole 120 on the side opposite to the vibration table assembly 300. The second connecting hole 120 is spaced apart from the first connecting hole 110. The end of the second connecting member 220 away from the heating plate 400 is accommodated in the second connecting hole 120 and connected to the hole wall of the second connecting hole 120. When it is necessary to separate the heat insulation plate 100 from the heating plate 400, it is only necessary to separate the second connecting member 220 from the hole wall of the second connecting hole 120 to complete the separation of the heat insulation plate 100 from the heating plate 400, which is very simple and convenient.

[0046] Please see Figures 1-6 In this embodiment of the vibration experimental apparatus, the second connecting hole 120 of the heat insulation platform is a blind hole opening towards the heating plate 400. Because the second connecting hole 120 is a blind hole opening towards the heating plate 400, one end of the second connector 220 is connected to the wall of the second connecting hole 120, and the other end of the second connector 220 is connected to the heating plate 400. Therefore, during long-term high-temperature experiments on the experimental sample 600, the second connector 220 cannot easily transfer the heat of the heating plate 400 itself to the vibration table assembly 300. The vibration table assembly 300 maintains a lower temperature and is less prone to damage. In one specific embodiment, the second connecting hole 120 is a blind hole with internal threads, and the second connector 220 is a stud, making installation more convenient.

[0047] Please see Figures 1-6The vibration test apparatus provided in the first and second embodiments of the present invention has multiple second connection holes 120 on the heat insulation platform, which are spaced apart along the length of the heat insulation plate 100. Because multiple second connection holes 120 are provided and spaced apart along the length of the heat insulation plate 100, the connection between the heat insulation plate 100 and the heating plate 400 is more stable. Under long-term high-temperature vibration test conditions, the heat insulation plate 100 and the heating plate 400 are less likely to detach, resulting in better stability of the entire vibration test apparatus. This effectively reduces the unsafe situation of separation caused by the failure of some second connectors 220 under long-term high-temperature conditions. Of course, in some embodiments, the multiple second connection holes 120 may also be spaced apart along the width of the heat insulation plate 100. Alternatively, in some embodiments, the multiple second connection holes 120 are spaced apart along both the length and width directions of the heat insulation plate 100.

[0048] Please see Figure 1 , Figure 2 , Figure 4 and Figure 5 In this embodiment of the invention, a plurality of first connecting holes 110 on the heat insulation plate 100 of the heat insulation platform are respectively disposed on both sides of a plurality of second connecting holes 120, and the plurality of first connecting holes 110 are disposed on the outer periphery of the projection surface of the heating plate 400 projected onto the heat insulation plate 100 directly above it, so as to minimize the heat generated by the heating plate 400 from being transferred to the vibration table assembly 300 through the first connecting member 210 in the first connecting hole 110. In one specific embodiment, the number of first connecting holes 110 is four, and the number of second connecting holes 120 is two, wherein two first connecting holes 110 are disposed on the left side of the two second connecting holes 120, and two first connecting holes 110 are disposed on the right side of the two second connecting holes 120. The number of first connecting members 210 is adapted to the number of first connecting holes 110, and the number of second connecting members 220 is adapted to the number of second connecting holes 120. Of course, in other embodiments, the number of the first connecting holes 110 can also be six or eight, and the number of the second connecting holes 120 can be four or six, etc. There is no limitation on this, and it can be adapted to the size of the heat insulation plate 100 and the size of the heating plate 400.

[0049] Please see Figure 1 , Figure 2 , Figure 4 and Figure 5The present invention also provides a vibration experimental apparatus, which includes the aforementioned heat-insulating platform, a vibration table assembly 300, and a heating plate 400. The vibration table assembly 300 includes an extension stage 310, which has a third connecting hole 311. One end of a first connecting member 210, away from the heat-insulating plate 100, is accommodated within the third connecting hole 311 and connected to the hole wall of the third connecting hole 311. The heating plate 400 is used to connect to the experimental sample 600. A fourth connecting hole 410 is provided on the side of the heating plate 400 away from the experimental sample 600. One end of a second connecting member 220, away from the heat-insulating plate 100, is accommodated within the fourth connecting hole 410 and connected to the hole wall of the fourth connecting hole 410. By providing the third connecting hole 311 on the extension stage 310, the first connecting member 210 is connected to both the hole wall of the first connecting hole 110 and the hole wall of the third connecting hole 311, thereby achieving the connection between the heat-insulating platform and the vibration table assembly 300. By providing a fourth connecting hole 410 on the side of the heating plate 400 away from the experimental sample 600, and connecting the second connecting member 220 to the wall of the second connecting hole 120 and the wall of the fourth connecting hole 410, the connection between the heat insulation platform and the heating plate 400 is achieved, which is very simple and convenient. When the vibration table assembly 300 or the heating plate 400 malfunctions or requires maintenance after long-term use, it is only necessary to separate the first connecting member 210 from the wall of the third connecting hole 311, or the second connecting member 220 from the wall of the fourth connecting hole 410, to perform fault diagnosis and maintenance.

[0050] Please continue reading. Figure 1 , Figure 2 , Figure 4 and Figure 5 The vibration testing apparatus provided in this embodiment of the invention further includes a fourth connecting member 240. A seventh connecting hole 420 is provided on the side of the heating plate 400 away from the heat insulation plate 100, and an eighth connecting hole 610 is provided on the test sample 600. One end of the fourth connecting member 240 is connected to the wall of the seventh connecting hole 420, and the other end of the fourth connecting member 240 is connected to the wall of the eighth connecting hole 610. When a vibration fatigue test is required on the test sample 600, the test sample 600 is fixed to the heating plate 400 via the fourth connecting member 240, which is convenient to operate and easy to disassemble. In one specific embodiment, the fourth connecting member 240 is a stud, and the seventh connecting hole 420 and the eighth connecting hole 610 are threaded blind holes.

[0051] In one specific embodiment, the extension stage 310 is made of magnesium alloy or aluminum alloy, which has a high strength-to-weight ratio, resulting in a lighter overall weight and consequently a lighter overall weight of the vibration table assembly 300. During vibration fatigue testing, the vibration acceleration is more easily increased, leading to smaller errors in the experimental data and higher accuracy of the experimental results.

[0052] In one embodiment, the vibration table assembly 300 further includes a moving coil 320, which is connected to the side of the expansion stage 310 away from the heat insulation plate 100. The moving coil 320 itself generates vibration and transmits it to the expansion stage 310. The maximum operating temperature of the moving coil 320 cannot exceed 50°C, and the maximum load is 120 kg. Because the maximum operating temperature of the moving coil 320 cannot exceed 50°C, in long-term high-temperature vibration fatigue tests, the heat from the heating plate 400 is difficult to transfer to the expansion stage 310 and the moving coil 320 through the heat insulation plate 100, thus keeping the temperature of the moving coil 320 low and preventing damage.

[0053] Please see Figure 1 , Figure 2 , Figure 4 and Figure 5 The vibration experimental apparatus provided in this embodiment of the invention further includes a third connecting member 230. A fifth connecting hole 312 is provided on the side of the expansion stage 310 away from the heat insulation plate 100, and a sixth connecting hole 321 is provided on the side of the moving coil 320 near the expansion stage 310. One end of the third connecting member 230 is connected to the wall of the fifth connecting hole 312, and the other end of the third connecting member 230 is connected to the wall of the sixth connecting hole 321. When it is necessary to install the expansion stage 310 on the moving coil 320, this can be achieved through the fourth connecting member 240, which is convenient and easy to disassemble. In one specific embodiment, the third connecting member 230 is a stud, and the fifth connecting hole 312 and the sixth connecting hole 321 are threaded blind holes. Since the fifth connecting hole 312 is a blind hole, it will not directly contact the heat insulation plate 100. This reduces the amount of heat emitted by the heat insulation plate 100 that is transferred to the third connector 230 and finally to the moving coil 320 through the fifth connecting hole 312, resulting in a lower temperature for the moving coil 320 and making it less prone to overheating damage.

[0054] In one embodiment, the vibration table assembly 300 further includes a power amplifier, which has protection and interlocking functions for faults such as output overvoltage, output overcurrent, amplifier overtemperature, moving coil 320 overdisplacement, expansion stage 310 overtemperature, and cooling system faults.

[0055] In one specific embodiment, the heating plate 400 is made of aluminum alloy or magnesium alloy with three built-in heating rods. Since the heating plate 400 is made of aluminum alloy, it is relatively lightweight, and the vibration acceleration is easier to increase. Therefore, the vibration signal transmitted from the vibration table assembly 300 to the experimental sample 600 through the heating plate 400 is more accurate; moreover, the heating plate 400 has better thermal conductivity.

[0056] It should be noted that, in order to facilitate the increase of acceleration during the vibration experiment, both the extension stage 310 and the heating plate 400 are made of aluminum alloy or magnesium alloy. Therefore, both have high thermal conductivity, strong heat transfer capacity, and fast heat transfer speed. When the experimental sample 600 is subjected to a long-term high-temperature vibration experiment, the heat from the heating plate 400 is not easily transferred to the moving coil 320 of the vibration table assembly 300 through the heat insulation plate 100. The temperature of the moving coil 320 can be maintained at a low level, and the moving coil 320 is less prone to damage.

[0057] Please see Figure 1 and Figure 4 The vibration experimental apparatus provided in the first and second embodiments of the present invention further includes a temperature control chamber 500, which is electrically connected to the heating plate 400. The temperature control chamber 500 is used to control the heating temperature of the heating plate 400 and keep the heating plate 400 at a constant temperature. Specifically, the temperature control chamber 500 is equipped with a display screen 510, which is used to display the heating temperature of the heating plate 400. The temperature control chamber 500 is also equipped with indicator lights 520, which are used to indicate the heating state or constant temperature state of the heating plate 400. In one specific embodiment, there are two indicator lights 520, one red and one green. When the heating plate 400 is in the heating state, the red indicator light 520 is lit; when the heating plate 400 is in the constant temperature state, the green indicator light 520 is lit, which is convenient for the user to observe and use. The temperature control box 500 is also equipped with a temperature sensor 530, which is electrically connected to the heating plate 400. The temperature sensor 530 can transmit the temperature of the heating plate 400 to the temperature control box 500 in real time. Using the temperature sensor 530 to form a closed-loop control, the temperature of the heating plate 400 can be well controlled, making the temperature of the heating plate 400 more accurate. In one specific embodiment, the temperature control box 500 has a power of 3kW and an accuracy of 0.3%, and also incorporates a solid-state relay, a high-precision temperature controller, and heat sinks. Through the temperature control box 500 electrically connected to the heating plate 400, the heating plate 400 heats the IGBT module placed on it, in order to study the vibration fatigue strength of the IGBT module at different temperatures.

[0058] The vibration experimental apparatus provided in this embodiment of the invention includes a vibration table assembly 300 and a vibration controller. The vibration controller can set parameters such as vibration amplitude, acceleration, and frequency, and then design experiments to compare and analyze the influence of each vibration parameter on the vibration fatigue of the experimental sample 600. In one specific embodiment, the vibration controller can control the moving coil 320 and the extension stage 310 to generate vertical vibration. Of course, in other embodiments, the vibration controller can also control the moving coil 320 and the extension stage 310 to generate horizontal vibration according to experimental needs, enabling this vibration experimental apparatus to conduct multi-directional vibration fatigue experiments on the experimental sample 600. It should be noted that the direction of vibration generated by the vibration controller is not limited and can be designed according to experimental requirements.

[0059] Please see Figure 1 and Figure 4 The vibration testing apparatus provided in the first and second embodiments of the present invention further includes an air outlet assembly 700, which is connected to the vibration table assembly 300. The air outlet assembly 700 is used to dissipate heat from the vibration table assembly 300 during operation, ensuring a lower temperature for the entire vibration table assembly 300 and preventing damage to the moving coil 320. In one specific embodiment, the air outlet assembly 700 is a cooling fan with a novel airflow design and a forward-curved multi-blade impeller, resulting in even better heat dissipation for the entire vibration table assembly 300.

[0060] The vibration testing apparatus provided in this embodiment of the invention also includes a static parameter testing system component. This component is connected to the experimental sample 600 and can test changes in parameters such as the threshold voltage, saturation voltage drop, and diode voltage drop of the experimental sample 600, thereby analyzing the performance of the experimental sample 600 under different vibration fatigue test conditions. In one specific embodiment, the static parameter testing system component is connected to a welded IGBT module. This component can test parameters such as the gate threshold voltage, cutoff leakage current, gate leakage current, and saturation voltage drop of the welded IGBT module. By monitoring changes in parameters such as the threshold voltage, saturation voltage drop, and diode voltage drop of the welded IGBT module before and after vibration using the static parameter testing system component, the vibration fatigue of the welded IGBT module can be analyzed.

[0061] Please see Figure 1 and Figure 4 The vibration test device provided in this embodiment of the invention also includes a housing 330, which is connected to the moving coil 320. The housing 330 is provided with a mounting cavity, in which the moving coil 320 is housed and connected to the housing 330. The housing 330 can reduce the contact area between the operator and the moving coil 320 that generates vibration, making the entire device safer.

[0062] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A heat-insulating platform, characterized in that, The heat insulation platform includes a heat insulation plate (100), a first connector (210), and a second connector (220); The heat insulation plate (100) is used to be disposed between the vibration table assembly (300) and the heating plate (400); The heat insulation plate (100) is provided with a first connecting hole (110); the first connecting member (210) is used to connect the heat insulation plate (100) and the vibration table assembly (300), and one end of the first connecting member (210) away from the vibration table assembly (300) is accommodated in the first connecting hole (110) and connected to the hole wall of the first connecting hole (110); and the length of the first connecting member (210) accommodated in the heat insulation plate (100) is less than the thickness of the heat insulation plate (100); The heat insulation plate (100) is provided with a second connecting hole (120) on the side away from the vibration table assembly (300); the second connecting hole (120) is spaced apart from the first connecting hole (110); the second connector (220) is used to connect the heat insulation plate (100) and the heating plate (400); the end of the second connector (220) away from the heating plate (400) is accommodated in the second connecting hole (120) and connected to the hole wall of the second connecting hole (120); and the length of the second connector (220) accommodated in the heat insulation plate (100) is less than the thickness of the heat insulation plate (100).

2. The heat insulation platform according to claim 1, characterized in that, The first connecting hole (110) is a through hole that penetrates the heat insulation plate (100); or the first connecting hole (110) is a blind hole that opens toward the vibration table assembly (300).

3. The heat-insulating platform according to any one of claims 1 or 2, characterized in that, The number of the first connecting holes (110) is multiple, and the multiple first connecting holes (110) are spaced apart along the length of the heat insulation plate (100), and / or the multiple first connecting holes (110) are spaced apart along the width of the heat insulation plate (100).

4. The heat insulation platform according to claim 1, characterized in that, The second connection hole (120) is a blind hole with an opening facing the heating plate (400).

5. The heat-insulating platform according to any one of claims 1 or 4, characterized in that, The number of the second connecting holes (120) is multiple, and the multiple second connecting holes (120) are spaced apart along the length of the heat insulation plate (100), and / or the multiple second connecting holes (120) are spaced apart along the width of the heat insulation plate (100).

6. A vibration experimental apparatus, characterized in that, The heat insulation platform includes any one of claims 1-5, and further includes a vibration table assembly (300) and a heating plate (400); The vibration table assembly (300) includes an extension table (310), the extension table (310) is provided with a third connection hole (311), and the end of the first connector (210) away from the heat insulation plate (100) is accommodated in the third connection hole (311) and connected to the hole wall of the third connection hole (311). The heating plate (400) is used to connect with the experimental sample (600). The heating plate (400) has a fourth connecting hole (410) on the side away from the experimental sample (600). The end of the second connector (220) away from the heat insulation plate (100) is accommodated in the fourth connecting hole (410) and connected to the hole wall of the fourth connecting hole (410).

7. The vibration experimental apparatus according to claim 6, characterized in that, It also includes a temperature control box (500), which is electrically connected to the heating plate (400).

8. The vibration experimental apparatus according to any one of claims 6 or 7, characterized in that, It also includes an air outlet assembly (700) connected to the vibration table assembly (300).

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